Police say Richard Hartlin, 38, should be considered armed and dangerous, and members of the public should not approach him.

Hartlin is described as a white male, six feet tall and about 190 lbs, with brown hair and brown eyes.

Shortly after 9 p.m. on Saturday, police responded to a robbery at the Petro Canada gas station on Herring Cove Road.

A man entered the store and handed the clerk a note demanding cash, displaying what appeared to be a firearm under his jacket.

He fled with some money.

On April 16 just after 7:20 p.m., a male approached a cashier at Sobeyâs on Windsor Street and handed over a note demanding cash, indicating that he had a weapon. He was given money and left the store.

About an hour later, National Parole Services issued a Canada-wide warrant for Hartlinâs arrest when he failed to return for his curfew at a Halifax-area halfway house.

Anyone with information on Richard Hartlinâs whereabouts is asked to contact Halifax Regional Police at 490-5020.